Nickles, John M. (John Milton), 1859-1945.
Bibliography of North American geology for 1925 and 1926 / by John M. Nickles.
Washington, D.C. : U.S. G.P.O., 1928.
Includes index.
Paleontology -- North America -- Bibliography.
Petrology -- North America -- Bibliography.
Mineralogy -- North America -- Bibliography.
Geology -- North America -- Bibliography.
Geological Survey (U.S.)
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